A new biographical titbit has surfaced: that Delia was in the National Youth Orchestra in the 1950s where she met and befriended fellow composer Jonathan Harvey with whom she went to the Brussels World Fair ‘Expo 58’ where they heard the world première of Edgard Varese's all-electronic Poème Eléctronique on 425 loudspeakers.

5 January 2016
The audio for Closed Planet from 1962 has turned up. It was previously only known from four sides of Delia's handwritten notes and turns out to be a spoken scifi drama with Delian backing
tracks almost continuously throughout, providing the setting for each scene. The intenser highlights are on its page.

21 December 2015
Curses! A bug in sndfile-spectrogram has covered the spectrograms with strange spider-web-like interference patterns. I've fixed the bug and the fix will be included in its next release but now I have to recalculate all the spectrograms and try to remember the settings used for each!

Meanwhile, there is a potentially better technique to produce such spectrograms:
the Constant-Q transform. See Spectrograms#Software for links to papers and implementations.

19 November 2015
A different mix of Quest - fast was used to make the theme for Physical Science from 1975, including a rhythm loop made from just four of the beats. Unfortunately, it looks like this was someone else mangling Delia's work.

25th August 2015
The wikidelia and delia-derbyshire.net have been down for some days, as its web hosting company closed down and ran off with the ten years' credit that I had put aside to keep them available on the web, whatever happens to me.
It is now hosted at a different company on a faster server costing 6USD per month and is paid up for the next month. All donation go to pay these sites' web hosting in advance, thereby ensuring their continued existence. Thanks!

The musical mark-up on the reverse of the Science and Health manuscript seems to be something else, possibly another new piece.

8th September 2014
I just found out that the pay-for "Internet Zone" Avast! Antivirus product is blocking delia-derbyshire.net and wiki.delia-derbyshire.net, saying that they contains malware. This is simply not true.

31st August 2014
Bad news. Delia's title music for Engineering Craft Studies was never used (they used "Popcorn" instead), and the BBC has lost the tape on which there was a copy.

23rd August 2014
I have finished going through the Tape Library List's catalogue of the 300 tapes in the BBC Radiophonic Archive that are credited to Delia, to be able to reply to the Director of BBC Worldwide's belief that there is nothing there to be published. Result: There are Delia's final master tapes of her unpublished music for 124 (one hundred and twenty-four) BBC programmes on tape there, as compared to the 31 of Delia's pieces of music that have ever been published by the BBC (and remember, for each programme Delia often created several pieces of music). A further 31 tapes containing her unpublished music for another 31 programmes are missing and I have found alternate sources for just 4 of these.

1 April 2014
The WikiDelia has been off line since mid-January, when its free web hosting died without warning. Thanks to some donations I have now been able to put it up again, paid up until April 2015.